Summary
Acetabularia nuclei were isolated in solutions of sucrose and fixed, dehydrated and embedded for electron microscopy using a number of techniques. The dimensions of the nucleic changed during all the procedures used, but the addition of calcium to the fixative prevented swelling. The structure observed in isolated nuclei was in good agreement with that seen in nuclei in intact cells and amputated rhizoids. A layer of cytoplasm about 0.1 μ thick was found on the outside of even the cleanest nuclei — this layer probably gives the nucleus protection when it is isolated.
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Literature
Comandon, J., et D. de Fonbrune: Greffe nucléaire totale, simple du multiple chez une amibe. C. R. Soc. Biol. (Paris) 130, 744–749 (1939).
Crawley, J. C. W.: A cooled microscope stage using semiconductor thermoelectric cooling. J. Sci. Instrum. 40, 330 (1963a).
—: The fine structure of Acetabularia mediterranea. Exp. Cell Res. 32, 368–378 (1963b).
—: Cytoplasmic fine structure in Acetabularia. Exp. Cell Res. 35, 497–506 (1964).
—, and H. Harris: The fine structure of isolated HeLa cell nuclei. Exp. Cell Res. 31, 70–81 (1963).
Davies, H. G., and M. Spencer: The variation in the structure of erythrocyte nuclei with fixation. J. Cell Biol. 14, 445–458 (1962).
Fisher, H. W., and H. Harris: The isolation of nuclei from animal cells in culture. Proc. roy. Soc. B 156, 521–523 (1962).
Hämmerling, J.: Nucleo-cytoplasmic relationships in the development of Acetabularia. Int. Rev. Cytol. 2, 475–498 (1953).
—: Nucleo-cytoplasmic interactions in Acetabularia and other cells. Ann. Rev. Plant Physiol. 14, 65–92 (1963).
Kellenberger, E., A. Ryter, and J. Sechauld: Electron microscope study of DNA-containing plasma. II. Vegetative and mature phage DNA as compared with normal bacterial nucleoids in different physiological states. J. biophys. biochem. Cytol. 4, 671–678 (1958).
Maggio, R., P. Siekevitz, and G. E. Palade: Studies on isolated nuclei. I. Isolation and chemical characterisation of a nuclear fraction from guinea pig liver. J. Cell Biol. 18, 267–291 (1963).
Nebel, B. R., S. A. Tyler, and C. J. Murphy: A note on the statistical determination of shape of chromatin elements in human spermatid and Tradescantia microsporocyte. J. biophys. biochem. Cytol. 7, 377–379 (1960).
Reynolds, E.S.: The use of lead citrate at high pH as an electron-opaque stain in electron microscopy. J. Cell Biol. 17, 208–212 (1963).
Richter, G.: Die Auslösung kerninduzierter Regeneration bei gealterten kernlosen Zellteilen von Acetabularia und ihre Auswirkungen auf die Synthese von Ribonukleinsäure und Cytoplasmaproteinen. Planta (Berl.) 52, 554–564 (1959).
Stäubli, W.: A new embedding technique for electron microscopy combining a water-soluble epoxy resin (Durcupan) with water-insoluble Araldite. J. Cell Biol. 16, 197–201 (1963).
Werz, G.: Zur Frage der Elimination von Ribonukleinsäure und Protein aus dem Zellkern von Acetabularia mediterranea. Planta (Berl.) 57, 636–655 (1962).
—: Das Fernsehmikroskop und seine Anwendung für qualitative und quantitative Untersuchungen in der Zellforschung. Z. wiss. Mikr. 65, 265–278 (1963).
—: Untersuchungen zur Feinstruktur des Zellkernes und des perinucleären Plasmas von Acetabularia. Planta (Berl.) 62, 255–271 (1964).
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Crawley, J.C.W. The fine structure of isolated Acetabularia nuclei. Planta 65, 205–217 (1965). https://doi.org/10.1007/BF00390122
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DOI: https://doi.org/10.1007/BF00390122